Oil-burner.



No. 205,341. Patentad Mg, 5, I902. L. A. PFEIFFER & L. n. STAPLES.

IL BURNEB.

(Application filed Nov. 13, 1901.)

(No Mode|.)

'suitable or desired metal.

in STATES PATENT OFFICE.

- OUIS A. IFEIFFER AND LYMAN D. STAPLES, OF SAN FRANCISCO,

CALIFORNIA.

OIL-BURNER.

SPECIICAJIN forfnng part of Letters Patent No. 70 6,341, dated August 5, 1902.

Application filed November 13, 1901. -Serial No. 82,135i (No modal.)

T0 (LZZ ZU'LO7H; it may conccrn:

Be it known that we, LOUIS A. PFEIFFER and LYMAN D. STAPLES, citizens of the United States, residing in the city and county of San Francisco, State of California, haveinvented an Improvement in Oil-Burners; and We hereby declare the following to be a full, clear, and exact description of the same.

Our invention relates to an apparatus for the proper combustion of hydrocarbon oils to be used for generating heat for various purp0ses.

It consists of concentric annnlar passages through which oil and steam are transmitted, having converging discharge ends at which point the two are brou ght together before being delivered to the burner. In conjunction with the tubes forming the annular passages are peculiarly-shaped nds or supports to which the tubes are secured and through Which inlet and discharge passages are formed.

Our invention urther consists in a incans for adjusting the discharge-cones With relation to each other, so as to regulate the amount and proportion of oil and steam at the discharge and mixing end.

The invention also comprises details of con struction, which will be more fully explained by reference to the accompanying drawing, in which the figure is a longitudinal section through the burner.

One object of our invention is to retain the steam under boiler-pressure and heat in a chamber inclosing that through which the oil flows and to mix the two at this high temperature within the burner-chamber,with the resultant advantages of the higher heat and drier steam.

As illustrated in the present drawing, the apparatus consists of an outer tube A and an inner tube B and in conjunction With these of a casting 2, by which the rear ends of the tubes are supported and through which the steam and oil inlets pass, and the casting 3, which supports the opter or discharge end and in conjunction therewith forms the conical discharge-passage and regulator. The blocks 2 and 3 may be cast or made of any The block 2 bas flanges :L and 5 projecting from opposite ends of the main body. The onter and larger tube A is screwed into the exterior fiange, extending therefrom toward the discharge. To the fiange 5' is screwed the cap 6, which closes the rear end and forms an oil-chamber behind v the part 2. The central portion of 2 has an opening through it of sufficient diameter to allow the pipe B to pass, and the joint formed where this pipe passes through 2 is made tight by packing, as at 7, and a gland S, through which the pipe passes, said gland beig screwed down upon the packing sufficiently to make a tight joint.

Through the lower part of block 2 a passage is made, as shown at 9, and this serves for'the admission of the oil into the chamber previously described as being formed at the rear 01: 2. 10 is a similar passage shown on the opposite side of the bloc]: 2, through which steam is admitted into the space between the pipes A and B. From the chamber into which the oil is admitted it passes through holes 11 into the interior of the pipe B, the rear end of which is closed in any suitable manner. As here shown, it passes out of the oil-chamber through a suitable stuffing-box, as at 12, and sorews into the hub of a hand-wheel 13, by which it can be advanced or retracted, for a purpose to be hereinafter described.

The front block 3 bas fianges 14: and 15, to the first of which the outer pipe A is screwed, and to the second one the tubular extension 16 is screwed, this extension carrying the burner, as at 17.

The inner tube B is for convenience made With a screw-threaded joint or coupling, as shown at 18, so that it can be easily separated. When it is desired to take the borner apart by disengagng the rear portion from the coupling and nnscrewing the outer tube from the fiange at 14, the two parts can be readily separated.

The space between A and B connects With a converging passage 19 within the block 3 and exterior to a similarly-formed converging portion 1) at the front end of the pipe B. Within the pipe B is a central cor-e20 of sufficiently smaller diameter than the interior of B to leave an annular space all around it, and this coro has a conical front end, as at 21, cor- IOO responding With the interior of the bloc]; 3 and with the formof the portion I) of the tube B, so that this arrangement provides for,the annular convergent channel 19 opening from the space between the tubes A and B and conducting steam which is admitted through the passage 10 and a similar annular convergent channel between b and 2l,which conducts oil flowing from the rear oil-chamber, to which it is admitted by the passage 9 through the space between the core 20 and the inner tube B. The core 20 may be hollow or solid,'as preferred, and the front end of the core and also of the tube 19 are suitab1y supported and guided, so that they may be moved forward or back within the block The tube B, which, as previouslydescribed, is connected with the hand-wheel 13, is advanced by turning the hand-wheel, the tube being screw-threaded where it passesthrough the diaphragm 24 or at other suitable point, and by moving it forward or back the steamdischarge channel 19 is varied. The core 20 passes out through the interior of the tube B and through its hub 13 and has fixed to its rear end a second handwheel 22. This core beingalso screw-threaded where it passes through the bracket 27 can be advanced and retracted independently of the pipe B, and in this manner the oil-passage between it and the parts 1) of the tube B can be vared with relation tothe steam-inlet, as may be desired. The inner passage 27 opens into a centrally-disp0sed tube or chamber 23 in front of the block 3, and this is provided With holes or perforations through which the oil is discbarged into the larger exterior chamber, which forms part of the burner 17, being thoroughly mixed in this chamber With the steam, Which is first discharged from the passage 19 into a chamber formed by a diaphragm 24:, which is screw-threaded on the periphery, so as to fit similar threads in the fiange 15, and this allows it to be adjusted to increase or decrease the size of the chamber into which the steam is first discharged. From this ohamber the steam passes through slots or openings 25 -into the main mixing and burner chamber 17.

The front end of the tube B where converged bas a tubular extension 26, screw-threaded on the outside and turnable in similar threads in a 11016 made centraily throngh the diaphragm 24, and this supports the tubeand allows it to be moved by turning the hand-wheel 13, so as to regulate the discharge-passage 19. The inner passage 6 is similarly regulated by advancing or retracting the core 20, the rear end of which (or its stem) is screw-threaded where it passes through the bracket 27 and provided with a suitable turning device 22. This construction allows the steam in the space between the tubes A and B to retain approximately boiler heat and pressure, and the oil in the inner passage between B and the cone is consequently more highly heated. The steam being botter and drier makes a better mixture With the oil in the burnerchamber, from which it is delivered and ignited through any desired form of exit-opening. To sti1l increase the mixing capacity, a nozzle 28 is formed on the casting 16, its opening directing the mixture ciose to the burnercap.

Having thus described our invention, what We ciaim, and desire to secure by Letters Patent, is

1. The combination in an oil-burnerof concentric tubes forming a steam-space, with an inlet at one end and a convergent discharge at the other, a core forming an anhular spaoe between'itself and the inner tube said inner tube having the rearend connecting With the oil-inlet and the front forming a convergent discharge within and concentric with the steam-discharge,amixing-chamber to receive the discharge from both tubes said inner tube having an extension beyond its convergent discharge and entering the mixing-chamber, and a perforated diaphragm between the mixingchamber and the said convergent passages and adjustable toward and from said passages, and a burner connecting with the mixing-chamber.

2. The combination in an oil-burnerof coneentric tubes, a block consisting of: a single casting having its body formed with steam and oil passages and having a projecting flange to which the rear end of the outer tube is screwed, said block having, also a central passage and stuffing-box through which the inner tube is movable; a cap fitting a rear fiange ot the block and forming a chamber at the rear of the block, said chamber communicating with the oil-passagein the block and said inner tube having perforations connecting With the oil-chamber, a block with which the front ends of the tubes are connected, a mixing-chamber into which the steam and oil are delivered at the front, discharge-openings and a burner inclosing the mixing-ohamber.

3. The combination in an oil-buri1er of concentric tubes and interior cy1indrical core having an annular space between it and the outer tube, a block consisting of a single casting formed integral With oil and steam passages and forwardly and rearwardly extending fianges, said outer tube connecting with one of said fianges and a cap fitted to the other flange and forming an oil-chamberbetween itself and the block said biock having a passage through it for the inner tube and said inner tube having perforations connecting with said chamber, a stuffing-box carried by the block and through which the inner tube passes, a second block at the front of the tubes, having projecting fianges at both ends, to one of which fianges the front end of the outer tube is fitted, said second block having a convergent passage between itself and a corresponding front portion of the inner tube, a core movable within the inner tube said inner tube extended beyond the second block, a mixing-chamber on the extension of the inner tube, an adjustable and perforated diaphragm between the mixing-chamber and the IIO second b1ock, and a burner connecting With the mixing-chamber.

4:. In an oil.burner, the oombination of inner and outer tubes, front and rear bloc]: to which the tubes are fitted, each of said blooks consisting of a single easting having front and rear extending fianges and one of said blocks having self-oontaiued oil and steam passages, a cap fitted to the rear fiange of the rear blook and formng an oil-chamber eommunicating With said oil-passage,and said inner tube having perforations oonneoting With said chamber, a ocre passing through the inner tube means for operating the core and inner tube independently, means formng independent, convergent steam and oi1 passages at the front of the tube, a mixing-ehamber in front of the tube and connecting with the inner tube, an adjustable perforated diaphragm between saidchamber and the forward block, and a burner.

5. The combination in an oil-bnrner of an outer tubular ehamber With blocks at opposite ends, an inner tubular chamber and a eore concentrie therewith, a mixing-ohamber at the front With a perforated adjustable diaphragm in the rear, said diaphragm having a screw-threaded central opening through which the extension of the main inner tube is guided and movable.

6. The combnation in an oil-burner of conoentric tubes having blocks at opposite ends and forming enter and inner chambers, a steam-passage opening through the rear block into the outer chamber and an oilpassage 35 leading into the inner chamber,a cone-shaped opening in the front block, a corresponding cone-shaped portion at the front of the inner tube, a guide and means for advaneing and retraoting the inner tube to vary the steampassage exterior to itself, a cone-headed core adjustable withn the inner tube and the coueshaped portion of the inner tube to vary the oil-passage, a burner-chamber With an adj ustable diaphragm forming a supplemental steam-ehamber With openings to admit stean to the burnerchamber,and a perforated head from which oil is delivered to meet the steam in said chamber.

In witness whereof we have hereunto set;

0111 hands.

LOUIS A. PFEIFFER. LYMAN D. STAPLES.

Witnesses:

A. K. DAGGETT, CHAS. S. COOVER. 

